问题在iText的PdfTextExtractor！ [英] Problem with PdfTextExtractor in itext!

问题描述

首先原谅我的英语不好！
我想在PDF文档中搜索，如你好一词。所以我必须在PdfTextExtractor阅读PDF的每一页。我做得很好。我可以阅读每一页的所有字单独的保存在字符串缓冲区。
，但是当我把这个代码在for循环中，（例如，从第1页至7在其搜索）早前页面的话会留在串buffer.I希望你们明白我的问题。
坦所有。
，这是我的代码：

first excuse me for my bad english! I want to search in pdf document for a word like "Hello" . So I must read each page in pdf by PdfTextExtractor. I did it well. I can read all words in each page separately an save it in string buffer. but when i push this code in For loop ,(for example from page 1 to 7 for search in it) earlier page's words will remain in string buffer.I hop you understand my problem. Tanx all. this is my code :

        PdfReader reader2 = new PdfReader(openFileDialog1.FileName);
        int pagen = reader2.NumberOfPages;
        reader2.Close();
        ITextExtractionStrategy its = new iTextSharp.text.pdf.parser.SimpleTextExtractionStrategy();
        for (int i = 1; i < pagen; i++)
        {
            textBox1.Text = "";
            PdfReader reader = new PdfReader(openFileDialog1.FileName);

            String  s = PdfTextExtractor.GetTextFromPage(reader, i, its);
            //MessageBox.Show(s.Length.ToString());
            //PdfTextArray h = new PdfTextArray(s);

            //
            // s = "";
            s = Encoding.UTF8.GetString(ASCIIEncoding.Convert(Encoding.Default, Encoding.UTF8, Encoding.Default.GetBytes(s)));
            textBox1.Text = s;
            reader.Close();

}

}

推荐答案

SimpleTextExtractionStrategy不会让你重置它不幸的是，所以你必须把你的新SimpleTextExtractionStrategy（）内循环，而不是重用相同的对象。

SimpleTextExtractionStrategy doesn't let you reset it unfortunately, so you must move your "new SimpleTextExtractionStrategy()" inside the loop instead of reusing the same object.

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